Many Wal-Mart stores have the Ultra Sheer No Nonsense pantyhose priced at $1 regularly. In Sunday's SmartSource insert there was a coupon for $1 off any No Nonsense product. Use it on the $1 pantyhose to get them for free.
Plus, many of the packages include coupons in them for $1 off any No Nonsense product (coupon expires September 2009) which would net you even more free pantyhose!
If your area didn't get the $1 coupon, you can also sign up for a $1.50/1 coupon here.